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Finding the Fourth Proportional to 3,915.38, 5,398.87 and 3,017.11

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Solution

The fourth proportional to 3,915.38, 5,398.87 and 3,017.11 is: 4,160.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,915.38 : 5,398.87 = 3,017.11 : x
  2. Step 2: Convert to fraction form
    3,915.38/5,398.87 = 3,017.11/x
  3. Step 3: Cross multiply
    3,915.38x = 5,398.87 × 3,017.11
  4. Step 4: Simplify right side
    3,915.38x = 16,288,984.67
  5. Step 5: Solve for x
    x = 16,288,984.67/3,915.38
  6. Step 6: Final answer
    x = 4,160.26

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.